diff mbox series

[v2,3/4] KVM: riscv: selftests: Fix ISA_EXT register handling in get-reg-list

Message ID 20230920154608.1447057-4-apatel@ventanamicro.com (mailing list archive)
State Accepted
Commit ba1af6e2e0f0e814c0f6be6ef64917c212f9fa96
Headers show
Series KVM RISC-V fixes for ONE_REG interface | expand

Commit Message

Anup Patel Sept. 20, 2023, 3:46 p.m. UTC 
Same set of ISA_EXT registers are not present on all host because
ISA_EXT registers are visible to the KVM user space based on the
ISA extensions available on the host. Also, disabling an ISA
extension using corresponding ISA_EXT register does not affect
the visibility of the ISA_EXT register itself.

Based on the above, we should filter-out all ISA_EXT registers.

Fixes: 477069398ed6 ("KVM: riscv: selftests: Add get-reg-list test")
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
---
 .../selftests/kvm/riscv/get-reg-list.c        | 35 +++++++++++--------
 1 file changed, 21 insertions(+), 14 deletions(-)
diff mbox series

Patch

diff --git a/tools/testing/selftests/kvm/riscv/get-reg-list.c b/tools/testing/selftests/kvm/riscv/get-reg-list.c
index d8ecacd03ecf..76c0ad11e423 100644
--- a/tools/testing/selftests/kvm/riscv/get-reg-list.c
+++ b/tools/testing/selftests/kvm/riscv/get-reg-list.c
@@ -14,17 +14,33 @@ 
 
 bool filter_reg(__u64 reg)
 {
+	switch (reg & ~REG_MASK) {
 	/*
-	 * Some ISA extensions are optional and not present on all host,
-	 * but they can't be disabled through ISA_EXT registers when present.
-	 * So, to make life easy, just filtering out these kind of registers.
+	 * Same set of ISA_EXT registers are not present on all host because
+	 * ISA_EXT registers are visible to the KVM user space based on the
+	 * ISA extensions available on the host. Also, disabling an ISA
+	 * extension using corresponding ISA_EXT register does not affect
+	 * the visibility of the ISA_EXT register itself.
+	 *
+	 * Based on above, we should filter-out all ISA_EXT registers.
 	 */
-	switch (reg & ~REG_MASK) {
+	case KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_A:
+	case KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_C:
+	case KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_D:
+	case KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_F:
+	case KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_H:
+	case KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_I:
+	case KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_M:
+	case KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_SVPBMT:
 	case KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_SSTC:
 	case KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_SVINVAL:
 	case KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_ZIHINTPAUSE:
+	case KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_ZICBOM:
+	case KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_ZICBOZ:
 	case KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_ZBB:
 	case KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_SSAIA:
+	case KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_V:
+	case KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_SVNAPOT:
 	case KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_ZBA:
 	case KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_ZBS:
 	case KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_ZICNTR:
@@ -50,12 +66,7 @@  static inline bool vcpu_has_ext(struct kvm_vcpu *vcpu, int ext)
 	unsigned long value;
 
 	ret = __vcpu_get_reg(vcpu, RISCV_ISA_EXT_REG(ext), &value);
-	if (ret) {
-		printf("Failed to get ext %d", ext);
-		return false;
-	}
-
-	return !!value;
+	return (ret) ? false : !!value;
 }
 
 void finalize_vcpu(struct kvm_vcpu *vcpu, struct vcpu_reg_list *c)
@@ -506,10 +517,6 @@  static __u64 base_regs[] = {
 	KVM_REG_RISCV | KVM_REG_SIZE_U64 | KVM_REG_RISCV_TIMER | KVM_REG_RISCV_TIMER_REG(time),
 	KVM_REG_RISCV | KVM_REG_SIZE_U64 | KVM_REG_RISCV_TIMER | KVM_REG_RISCV_TIMER_REG(compare),
 	KVM_REG_RISCV | KVM_REG_SIZE_U64 | KVM_REG_RISCV_TIMER | KVM_REG_RISCV_TIMER_REG(state),
-	KVM_REG_RISCV | KVM_REG_SIZE_ULONG | KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_A,
-	KVM_REG_RISCV | KVM_REG_SIZE_ULONG | KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_C,
-	KVM_REG_RISCV | KVM_REG_SIZE_ULONG | KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_I,
-	KVM_REG_RISCV | KVM_REG_SIZE_ULONG | KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_M,
 	KVM_REG_RISCV | KVM_REG_SIZE_ULONG | KVM_REG_RISCV_SBI_EXT | KVM_REG_RISCV_SBI_SINGLE | KVM_RISCV_SBI_EXT_V01,
 	KVM_REG_RISCV | KVM_REG_SIZE_ULONG | KVM_REG_RISCV_SBI_EXT | KVM_REG_RISCV_SBI_SINGLE | KVM_RISCV_SBI_EXT_TIME,
 	KVM_REG_RISCV | KVM_REG_SIZE_ULONG | KVM_REG_RISCV_SBI_EXT | KVM_REG_RISCV_SBI_SINGLE | KVM_RISCV_SBI_EXT_IPI,